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//Written by Fabian Figueredo
//http://oberdata.com.ar info@fabianfigueredo.com.ar

//Based on: http://www.beansoftware.com/ASP.NET-Tutorials/Get-Web-Site-Thumbnail-Image.aspx

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Threading;
using System.IO;
using System.Reflection;
using System.Drawing;
using System.Drawing.Imaging;

namespace AFDS.Controls.SiteThumbnail
{
    public class WebsiteThumbnailImageGenerator
    {
        public static Bitmap GetWebSiteThumbnail(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
        {
            WebsiteThumbnailImage thumbnailGenerator = new WebsiteThumbnailImage(Url, BrowserWidth, BrowserHeight, ThumbnailWidth, ThumbnailHeight);
            return thumbnailGenerator.GenerateWebSiteThumbnailImage();
        }

        public static bool GetWebSiteThumbnailAndSave(string Url, string file_path, int ThumbnailWidth, int ThumbnailHeight)
        {
            try
            {
                WebsiteThumbnailImage thumbnailGenerator =
                    new WebsiteThumbnailImage(
                        Url, ThumbnailWidth, ThumbnailHeight);

                Bitmap bm = thumbnailGenerator.GenerateWebSiteThumbnailImage();
                bm.Save(file_path, ImageFormat.Jpeg);
                return true;
            }
            catch
            {
                return false;
            }
        }


        private class WebsiteThumbnailImage
        {

            public WebsiteThumbnailImage(string Url, int ThumbnailWidth, int ThumbnailHeight)
            {
                this.m_Url = Url;
                this.m_ThumbnailHeight = ThumbnailHeight;
                this.m_ThumbnailWidth = ThumbnailWidth;
            }
            
            public WebsiteThumbnailImage(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
            {
                this.m_Url = Url;
                this.m_BrowserWidth = BrowserWidth;
                this.m_BrowserHeight = BrowserHeight;
                this.m_ThumbnailHeight = ThumbnailHeight;
                this.m_ThumbnailWidth = ThumbnailWidth;
            }

            private string m_Url = null;
            public string Url
            {
                get
                {
                    return m_Url;
                }
                set
                {
                    m_Url = value;
                }
            }

            private Bitmap m_Bitmap = null;
            public Bitmap ThumbnailImage
            {
                get
                {
                    return m_Bitmap;
                }
            }

            private int m_ThumbnailWidth;
            public int ThumbnailWidth
            {
                get
                {
                    return m_ThumbnailWidth;
                }
                set
                {
                    m_ThumbnailWidth = value;
                }
            }

            private int m_ThumbnailHeight;
            public int ThumbnailHeight
            {
                get
                {
                    return m_ThumbnailHeight;
                }
                set
                {
                    m_ThumbnailHeight = value;
                }
            }

            private int m_BrowserWidth = 1024;
            public int BrowserWidth
            {
                get
                {
                    return m_BrowserWidth;
                }
                set
                {
                    m_BrowserWidth = value;
                }
            }

            private int m_BrowserHeight = 768;
            public int BrowserHeight
            {
                get
                {
                    return m_BrowserHeight;
                }
                set
                {
                    m_BrowserHeight = value;
                }
            }

            public Bitmap GenerateWebSiteThumbnailImage()
            {
                Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage));
                m_thread.SetApartmentState(ApartmentState.STA);
                m_thread.Start();
                m_thread.Join(20000);
                return m_Bitmap;
            }

            private void _GenerateWebSiteThumbnailImage()
            {
                WebBrowser m_WebBrowser = new WebBrowser();
                m_WebBrowser.ScrollBarsEnabled = false;
                m_WebBrowser.Navigate(m_Url);
                m_WebBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);
                while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete)
                    Application.DoEvents();
                m_WebBrowser.Dispose();
            }

            private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
            {
                WebBrowser m_WebBrowser = (WebBrowser)sender;
                m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight);
                m_WebBrowser.ScrollBarsEnabled = false;
                m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height);
                m_WebBrowser.BringToFront();
                m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);
                m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_ThumbnailWidth, m_ThumbnailHeight, null, IntPtr.Zero);
            }
        }
    }
}
